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ABS & Parking Brake light


Full Member
Apr 20, 2004
Memphis, TN
Anyone else seen this problem. For the last week or so I am getting warning lights from ABS and parking brake light coming on at the same time for no apparent reason? A restart solves the problem, its not putting out any codes and it can happen at a dead stop or going 70 down the highway. Anyone have any ideas? Thanks
While I was trying to figure out my problem, I found there is a TIB for the ground
wire on the frame behind the left front wheel. I don't know if this is causing
your problem ? they want you to remove the wire ends and clean them and
the mount point on the frame, reconnect and coat with undercoating.
This would be easy to check before sending to the shop.
I'm not sure if this covers the 02's.
How are you sure it's not setting a code?  Are you having the ABS module scanned for codes and code history?  The cheap scanners and Autozone scans do not check ABS.

I just went through this. See my post at http://www.chevyavalanchefanclub.com/cafcna/index.php/topic,84766.0.html for the eventual fix.

Based on what I found here, there are three possible problems. First, and easiest to fix is the faulty ground problem. Second is a faulty Elec. Brake Control Module (EBCM). This is what my mechanic diagnosed and wanted to charge me $1000+ to fix for parts and labor to install a new EBCM.

Based on input from this site, I went to modulemaster.com and Gavin there helped me out. Just installed a rebuilt EBCM from him with a 5 year warranty for $190.00 after the $60 credit for returning my used one. Took me less than an hour.

The third possibility is corrosion on the wheel sensor, but that apparently causes the ABS to engage and stay on at low speeds. That occurs mainly in snow belt states where salt and other chemicals cause corrosion of the sensor. If you have just the light problem, it's more than likely one of the other two possibilities.

Try a search for the ground problem and clean the connections. If the lights come back on (mine took a while) it's more than likely the EBCM.

Good luck. Let me know if I can assist further. (But I owe all I know to the others on this site who went before me.)

A few threads which may (or may not) be helpful.? :wave:




The more I think about it, those probably are not related to your problem.
Check this one instead...